Adult and pediatric patients with newly diagnosed acute myeloid leukemia, both eligible and not eligible for intensive chemotherapy. Since this is a noninterventional study, therapeutic strategies remains related to local guidelines. Will be treated as cases all patients with acute leukemia in first induction developing an Invasive Fungal Infection according to international EORTC criteria for possible/probable/proven infections. Patients who do not develop the infection will be used as a control group.